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[Place of publication not identified] : [publisher not identified], 1992.
German | 29 DE | Available |
2.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1991.
German | N 6333 DE 28 | Available |
3.
[Geneva, Switzerland] : [World Intellectual Property Organization], 1992.
German | N 614 DE 29 | Available |